At 12 40, Andy left Town G for Town H, driving at a speed of 64 km/h. At 15 40, Elijah also left Town G for Town H driving at a certain speed. Both of them did not change their speed throughout the journey. At 17 40, both of them passed a florist that was 192 km away from Town H. How many minutes earlier did Elijah reach Town H than Andy?

Distance that Andy travelled
= 5 x 64
= 320 km

Distance between Town G and Town H
= 320 + 192
= 512 km

Since Elijah passed the florist at the same time as Andy, it means that Elijah travelled 320 km in 2 hours.

Elijah's speed during the journey
= 320 ÷ 2
= 160 km/h

Duration that Elijah took to reach Town H after passing the florist
= 192 ÷ 160
= 1.2 h

Duration that Andy took to reach Town H after passing the florist
= 192 ÷ 64
= 3 h

Difference between the time they took to reach Town H
= 3 - 1.2
= 1.8 h

1 h = 60 min
1.8 h = 1.8 x 60 = 108 min

Elijah reached Town H 108 minutes earlier than Andy.

Answer(s): 108 min